Users Guide

status of the chassis always indicates no redundancy. The figure below illustrates no redundancy mode is
the factory default setting for three PSU configuration.
CMC does not require the PSU units to be present in any specific PSU slot positions when No
Redundancy is configured.
NOTE: All PSUs in the chassis are Online if DPSE is disabled when in No Redundancy mode. When
DPSE is enabled all active PSUs in the chassis are listed as Online and additional PSUs may be turned
to
Standby to increase the system's power efficiency.
Figure 7. No Redundancy with three PSUs in the chassis
A PSU failure brings other PSUs out of Standby mode, as needed, to support the chassis power
allocations. If you have four PSUs, and require only three, then in the event that one fails, the fourth PSU
is brought online. A chassis can have all six PSUs online.
When you enable DPSE, the extra PSUs may be placed in Standby mode to increase efficiency and save
power. For more information, see Default Redundancy Configuration.
Extended Power Performance (EPP)
Extended Power Performance mode enables allocation of 30% additional power in a configuration of six
Power Supply Units (PSUs), to the M1000e chassis, than the redundant power in a Grid Redundancy
configuration using 3000 W AC PSUs. However, the power allocated to servers is automatically reduced
in the event of an AC grid failure or a PSU failure, so that the servers are not powered off. A maximum of
2700W power can be allocated to support chassis with high-end configurations.
By default, the EPP feature is enabled on six 3000W AC power supply configuration. You can view the
current setting, disable and enable this feature using both the Web interface and the Command Line
interface.
EPP feature allows power allocations only when:
• Power is configured for Grid redundancy.
• There are six PSUs that are of 3000W AC type.
• System Input Power Cap is higher than 13300W AC (45381 BTU/h).
The power gained using EPP mode is available for increasing the server performance. When compared
with a six 2700W AC PSU configuration, the additional power available on a six 3000W AC PSU
configuration with Enhanced Cooling Mode for fans enabled and active is 723W. When compared with a
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